Add unit test for CheckBoxPopupAdapter (#13755)

* add unittest for checkBoxPopupAdapter

* little update

---------

Co-authored-by: Amy Li (BEYONDSOFT CONSULTING INC) <[email protected]>

Author: Amy-Li03

src/test/unit/System.Windows.Forms/System/Windows/Forms/CheckBoxPopupAdapterTests.cs

@@ -0,0 +1,129 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#nullable disable
+
+using System.Drawing;
+using System.Windows.Forms.ButtonInternal;
+using static System.Windows.Forms.ButtonInternal.ButtonBaseAdapter;
+
+namespace System.Windows.Forms.Tests;
+
+public class CheckBoxPopupAdapterTests : AbstractButtonBaseTests
+{
+    [WinFormsTheory]
+    [InlineData(CheckState.Unchecked)]
+    [InlineData(CheckState.Checked)]
+    [InlineData(CheckState.Indeterminate)]
+    public void PaintUp_DoesNotThrow_ForAllCheckStates(CheckState state)
+    {
+        using CheckBox checkBox = new();
+        CheckBoxPopupAdapter adapter = new(checkBox);
+        using Bitmap bitmap = new(checkBox.Width, checkBox.Height);
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        PaintEventArgs e = new(graphics, checkBox.ClientRectangle);
+
+        Action action = () => adapter.PaintUp(e, state);
+
+        action.Should().NotThrow();
+    }
+
+    [WinFormsTheory]
+    [InlineData(CheckState.Unchecked)]
+    [InlineData(CheckState.Checked)]
+    [InlineData(CheckState.Indeterminate)]
+    public void PaintOver_DoesNotThrow_ForAllCheckStates(CheckState state)
+    {
+        using CheckBox checkBox = new();
+        checkBox.Text = "Test";
+        CheckBoxPopupAdapter adapter = new(checkBox);
+        using Bitmap bitmap = new(checkBox.Width, checkBox.Height);
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        PaintEventArgs e = new(graphics, checkBox.ClientRectangle);
+
+        Action action = () => adapter.PaintOver(e, state);
+
+        action.Should().NotThrow();
+    }
+
+    [WinFormsTheory]
+    [InlineData(CheckState.Unchecked)]
+    [InlineData(CheckState.Checked)]
+    [InlineData(CheckState.Indeterminate)]
+    public void PaintDown_DoesNotThrow_ForAllCheckStates(CheckState state)
+    {
+        using CheckBox checkBox = new();
+        checkBox.Text = "Test";
+        CheckBoxPopupAdapter adapter = new(checkBox);
+        using Bitmap bitmap = new(checkBox.Width, checkBox.Height);
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        PaintEventArgs e = new(graphics, checkBox.ClientRectangle);
+
+        Action action = () => adapter.PaintDown(e, state);
+
+        action.Should().NotThrow();
+    }
+
+    [WinFormsFact]
+    public void Layout_DoesNotThrow_WhenInvokedViaTestAccessor()
+    {
+        using CheckBox checkBox = new();
+        CheckBoxPopupAdapter adapter = new(checkBox);
+        using Bitmap bitmap = new(checkBox.Width, checkBox.Height);
+        using Graphics graphics = Graphics.FromImage(bitmap);
+        PaintEventArgs e = new(graphics, checkBox.ClientRectangle);
+
+        Action action = () => adapter.TestAccessor().Dynamic.Layout(e);
+
+        action.Should().NotThrow();
+    }
+
+    [WinFormsFact]
+    public void CreateButtonAdapter_DoesNotThrow_WhenInvokedViaTestAccessor()
+    {
+        using CheckBox checkBox = new();
+        CheckBoxPopupAdapter adapter = new(checkBox);
+
+        Action action = () => adapter.TestAccessor().Dynamic.CreateButtonAdapter();
+
+        action.Should().NotThrow();
+    }
+
+    [WinFormsTheory]
+    [InlineData(true, 11, 50, 20, 2, false, "First Test", true, ContentAlignment.MiddleLeft, RightToLeft.No)]
+    [InlineData(false, 15, 100, 40, 4, true, "Sec Test", false, ContentAlignment.TopRight, RightToLeft.Yes)]
+    public void PaintPopupLayout_Static_Properties_AreSet(
+        bool show3D,
+        int checkSize,
+        int width,
+        int height,
+        int paddingValue,
+        bool isDefault,
+        string text,
+        bool enabled,
+        ContentAlignment textAlign,
+        RightToLeft rtl)
+    {
+        Rectangle clientRect = new(0, 0, width, height);
+        Padding padding = new(paddingValue);
+        using Font font = SystemFonts.DefaultFont;
+
+        LayoutOptions layout = CheckBoxPopupAdapter.PaintPopupLayout(
+            show3D,
+            checkSize,
+            clientRect,
+            padding,
+            isDefault,
+            font,
+            text,
+            enabled,
+            textAlign,
+            rtl);
+
+        layout.Should().NotBeNull();
+        layout.CheckSize.Should().BeGreaterThan(0);
+        layout.ShadowedText.Should().BeFalse();
+    }
+
+    protected override ButtonBase CreateButton() => new CheckBox();
+}